slider checkpoint

src/MainWindow.h

@@ -0,0 +1,41 @@
+
+#pragma once
+
+#include <QMainWindow>
+
+QT_BEGIN_NAMESPACE
+namespace Ui {
+class MainWindow;
+}
+QT_END_NAMESPACE
+
+class MainWindow : public QMainWindow
+{
+    Q_OBJECT
+
+public:
+    explicit MainWindow(QWidget *parent = nullptr);
+    ~MainWindow();
+
+private slots:
+    void onIncrementClicked();
+    void onResetClicked();
+
+    void onSliderValueChanged(int value);
+    void onMinChanged() { applySliderRange(); }
+    void onMaxChanged() { applySliderRange(); }
+    void onStepChanged() { applySliderStep(); }
+    void onValueChanged();
+
+private:
+    Ui::MainWindow *ui;
+    int counter_ = 0;
+
+    int value = 0;
+
+    void updateCounterLabel();
+
+    void applySliderRange();
+    void applySliderStep();
+    void syncValueToUi(int value);
+};